/Engine/Source/Developer/AssetTools/Public/AssetTypeCategories.h
This enum has been extracted into a separate header for easier inclusion in code in other modules
namespace EAssetTypeCategories { enum Type { None = 0, Basic = 1 << 0, Animation = 1 << 1, Materials = 1 << 2, Sounds = 1 << 3, Physics = 1 << 4, UI = 1 << 5, Misc = 1 << 6, Gameplay = 1 << 7, Blueprint = 1 << 8, Media = 1 << 9, Textures = 1 << 10, FirstUser = 1 << 11, LastUser = 1 << 31, } }